./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 7c08193784b646afd298f73ae6296b7af2e0cac1 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 13:56:31,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 13:56:31,578 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 13:56:31,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 13:56:31,621 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 13:56:31,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 13:56:31,626 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 13:56:31,631 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 13:56:31,633 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 13:56:31,638 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 13:56:31,639 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 13:56:31,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 13:56:31,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 13:56:31,645 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 13:56:31,646 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 13:56:31,646 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 13:56:31,647 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 13:56:31,648 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 13:56:31,649 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 13:56:31,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 13:56:31,652 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 13:56:31,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 13:56:31,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 13:56:31,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 13:56:31,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 13:56:31,669 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 13:56:31,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 13:56:31,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 13:56:31,671 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 13:56:31,671 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 13:56:31,672 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 13:56:31,672 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 13:56:31,674 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 13:56:31,674 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 13:56:31,675 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 13:56:31,675 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 13:56:31,676 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 13:56:31,676 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 13:56:31,677 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 13:56:31,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 13:56:31,678 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 13:56:31,682 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-08-27 13:56:31,715 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 13:56:31,715 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 13:56:31,716 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 13:56:31,716 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 13:56:31,718 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 13:56:31,718 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 13:56:31,718 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 13:56:31,718 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-08-27 13:56:31,718 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-08-27 13:56:31,719 INFO L138 SettingsManager]: * Use old map elimination=false [2021-08-27 13:56:31,719 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-08-27 13:56:31,719 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-08-27 13:56:31,720 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-08-27 13:56:31,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 13:56:31,720 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 13:56:31,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 13:56:31,720 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 13:56:31,721 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-08-27 13:56:31,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-08-27 13:56:31,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-08-27 13:56:31,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-27 13:56:31,721 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-08-27 13:56:31,721 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 13:56:31,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-08-27 13:56:31,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 13:56:31,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 13:56:31,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 13:56:31,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 13:56:31,723 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 13:56:31,723 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-08-27 13:56:31,724 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c08193784b646afd298f73ae6296b7af2e0cac1 [2021-08-27 13:56:32,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 13:56:32,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 13:56:32,030 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 13:56:32,031 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 13:56:32,032 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 13:56:32,033 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig1.c [2021-08-27 13:56:32,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e1927290/3c1dcb24835e4e7294b9419b43ea8206/FLAG7b7517921 [2021-08-27 13:56:32,472 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 13:56:32,473 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/BrockschmidtCookFuhs-CAV2013-Fig1.c [2021-08-27 13:56:32,477 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e1927290/3c1dcb24835e4e7294b9419b43ea8206/FLAG7b7517921 [2021-08-27 13:56:32,890 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e1927290/3c1dcb24835e4e7294b9419b43ea8206 [2021-08-27 13:56:32,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 13:56:32,895 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-27 13:56:32,897 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 13:56:32,897 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 13:56:32,900 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 13:56:32,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:56:32" (1/1) ... [2021-08-27 13:56:32,901 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64eb4ee5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:32, skipping insertion in model container [2021-08-27 13:56:32,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:56:32" (1/1) ... [2021-08-27 13:56:32,906 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 13:56:32,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 13:56:33,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 13:56:33,055 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 13:56:33,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 13:56:33,080 INFO L208 MainTranslator]: Completed translation [2021-08-27 13:56:33,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:33 WrapperNode [2021-08-27 13:56:33,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 13:56:33,082 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-27 13:56:33,082 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-27 13:56:33,082 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-27 13:56:33,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:33" (1/1) ... [2021-08-27 13:56:33,093 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:33" (1/1) ... [2021-08-27 13:56:33,110 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-27 13:56:33,112 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 13:56:33,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 13:56:33,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 13:56:33,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:33" (1/1) ... [2021-08-27 13:56:33,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:33" (1/1) ... [2021-08-27 13:56:33,119 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:33" (1/1) ... [2021-08-27 13:56:33,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:33" (1/1) ... [2021-08-27 13:56:33,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:33" (1/1) ... [2021-08-27 13:56:33,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:33" (1/1) ... [2021-08-27 13:56:33,166 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:33" (1/1) ... [2021-08-27 13:56:33,167 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 13:56:33,169 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 13:56:33,169 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 13:56:33,169 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 13:56:33,170 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:33" (1/1) ... [2021-08-27 13:56:33,183 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:33,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:33,199 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:33,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-08-27 13:56:33,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 13:56:33,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 13:56:33,389 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 13:56:33,389 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-08-27 13:56:33,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:56:33 BoogieIcfgContainer [2021-08-27 13:56:33,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 13:56:33,392 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-08-27 13:56:33,393 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-08-27 13:56:33,395 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-08-27 13:56:33,396 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 13:56:33,396 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.08 01:56:32" (1/3) ... [2021-08-27 13:56:33,397 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@37b25809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 01:56:33, skipping insertion in model container [2021-08-27 13:56:33,397 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 13:56:33,397 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:56:33" (2/3) ... [2021-08-27 13:56:33,398 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@37b25809 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 01:56:33, skipping insertion in model container [2021-08-27 13:56:33,398 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 13:56:33,399 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:56:33" (3/3) ... [2021-08-27 13:56:33,400 INFO L389 chiAutomizerObserver]: Analyzing ICFG BrockschmidtCookFuhs-CAV2013-Fig1.c [2021-08-27 13:56:33,460 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-08-27 13:56:33,460 INFO L360 BuchiCegarLoop]: Hoare is false [2021-08-27 13:56:33,460 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-08-27 13:56:33,460 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-27 13:56:33,460 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-27 13:56:33,460 INFO L364 BuchiCegarLoop]: Difference is false [2021-08-27 13:56:33,461 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-27 13:56:33,461 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-08-27 13:56:33,471 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:33,485 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-08-27 13:56:33,485 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:56:33,486 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:56:33,491 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-08-27 13:56:33,491 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 13:56:33,491 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-08-27 13:56:33,491 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:33,492 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-08-27 13:56:33,493 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:56:33,493 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:56:33,493 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-08-27 13:56:33,493 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-08-27 13:56:33,499 INFO L791 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~i~0, main_~j~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~n~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~n~0 := main_#t~nondet2;havoc main_#t~nondet2; 3#L19-2true [2021-08-27 13:56:33,499 INFO L793 eck$LassoCheckResult]: Loop: 3#L19-2true assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 7#L21-2true assume !(main_~j~0 <= main_~i~0); 5#L21-3true main_~i~0 := 1 + main_~i~0; 3#L19-2true [2021-08-27 13:56:33,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:33,504 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2021-08-27 13:56:33,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:33,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146026445] [2021-08-27 13:56:33,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:33,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:33,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:33,577 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:33,591 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:33,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:33,594 INFO L82 PathProgramCache]: Analyzing trace with hash 39951, now seen corresponding path program 1 times [2021-08-27 13:56:33,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:33,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845854126] [2021-08-27 13:56:33,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:33,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:33,604 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:33,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:33,608 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:33,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:33,610 INFO L82 PathProgramCache]: Analyzing trace with hash 963472, now seen corresponding path program 1 times [2021-08-27 13:56:33,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:33,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71067554] [2021-08-27 13:56:33,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:33,611 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:33,617 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:33,623 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:33,701 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:56:33,702 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:56:33,702 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:56:33,702 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:56:33,703 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 13:56:33,703 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:33,703 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:56:33,703 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:56:33,703 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration1_Loop [2021-08-27 13:56:33,704 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:56:33,704 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:56:33,717 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:33,726 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:33,732 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:33,837 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:56:33,838 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 13:56:33,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:33,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:33,848 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:33,852 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:56:33,852 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:56:33,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-08-27 13:56:33,882 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:56:33,882 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:56:33,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2021-08-27 13:56:33,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:33,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:33,932 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:33,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-08-27 13:56:33,934 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:56:33,934 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:56:33,955 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:56:33,956 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:56:33,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2021-08-27 13:56:33,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:33,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:33,977 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:33,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-08-27 13:56:33,985 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:56:33,985 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:56:34,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:34,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:34,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:34,031 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:34,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-08-27 13:56:34,037 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 13:56:34,037 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:56:34,157 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 13:56:34,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:34,160 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:56:34,160 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:56:34,160 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:56:34,160 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:56:34,161 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 13:56:34,161 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:34,161 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:56:34,161 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:56:34,161 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration1_Loop [2021-08-27 13:56:34,161 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:56:34,161 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:56:34,163 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:34,168 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:34,172 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:34,229 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:56:34,233 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 13:56:34,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:34,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:34,235 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:34,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-08-27 13:56:34,251 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 13:56:34,258 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:56:34,259 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:56:34,259 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:56:34,259 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:56:34,272 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 13:56:34,272 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 13:56:34,285 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:56:34,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:34,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:34,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:34,333 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:34,344 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 13:56:34,351 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:56:34,351 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:56:34,351 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:56:34,351 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:56:34,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-08-27 13:56:34,355 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 13:56:34,355 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 13:56:34,380 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:56:34,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:34,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:34,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:34,397 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:34,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-08-27 13:56:34,406 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 13:56:34,412 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:56:34,412 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:56:34,413 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:56:34,413 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:56:34,413 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:56:34,415 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:56:34,415 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:56:34,426 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 13:56:34,432 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-08-27 13:56:34,432 INFO L444 ModelExtractionUtils]: 1 out of 5 variables were initially zero. Simplification set additionally 2 variables to zero. [2021-08-27 13:56:34,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:34,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:34,435 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:34,444 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 13:56:34,444 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 13:56:34,444 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 13:56:34,444 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2021-08-27 13:56:34,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-08-27 13:56:34,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:34,464 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 13:56:34,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:34,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 13:56:34,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:56:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:34,511 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 13:56:34,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:56:34,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:56:34,586 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-08-27 13:56:34,587 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:34,662 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0). Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 30 states and 48 transitions. Complement of second has 9 states. [2021-08-27 13:56:34,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2021-08-27 13:56:34,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:34,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 28 transitions. [2021-08-27 13:56:34,666 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 28 transitions. Stem has 1 letters. Loop has 3 letters. [2021-08-27 13:56:34,666 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:34,667 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 28 transitions. Stem has 4 letters. Loop has 3 letters. [2021-08-27 13:56:34,667 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:34,667 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 28 transitions. Stem has 1 letters. Loop has 6 letters. [2021-08-27 13:56:34,667 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:34,668 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 30 states and 48 transitions. [2021-08-27 13:56:34,673 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-08-27 13:56:34,675 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 30 states to 13 states and 18 transitions. [2021-08-27 13:56:34,676 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-08-27 13:56:34,676 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2021-08-27 13:56:34,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 18 transitions. [2021-08-27 13:56:34,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 13:56:34,677 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 18 transitions. [2021-08-27 13:56:34,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 18 transitions. [2021-08-27 13:56:34,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-08-27 13:56:34,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:34,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 17 transitions. [2021-08-27 13:56:34,697 INFO L704 BuchiCegarLoop]: Abstraction has 12 states and 17 transitions. [2021-08-27 13:56:34,697 INFO L587 BuchiCegarLoop]: Abstraction has 12 states and 17 transitions. [2021-08-27 13:56:34,697 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-08-27 13:56:34,697 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 17 transitions. [2021-08-27 13:56:34,699 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-08-27 13:56:34,699 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:56:34,699 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:56:34,699 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-08-27 13:56:34,699 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-08-27 13:56:34,700 INFO L791 eck$LassoCheckResult]: Stem: 89#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~i~0, main_~j~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~n~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~n~0 := main_#t~nondet2;havoc main_#t~nondet2; 90#L19-2 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 83#L21-2 [2021-08-27 13:56:34,700 INFO L793 eck$LassoCheckResult]: Loop: 83#L21-2 assume !!(main_~j~0 <= main_~i~0);main_~j~0 := 1 + main_~j~0; 91#L21-2 assume !(main_~j~0 <= main_~i~0); 86#L21-3 main_~i~0 := 1 + main_~i~0; 82#L19-2 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 83#L21-2 [2021-08-27 13:56:34,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:34,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2021-08-27 13:56:34,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:34,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875465942] [2021-08-27 13:56:34,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:34,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:34,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:34,716 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:34,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:34,720 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:34,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:34,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1506610, now seen corresponding path program 1 times [2021-08-27 13:56:34,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:34,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187101500] [2021-08-27 13:56:34,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:34,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:34,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:34,745 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:34,759 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:34,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:34,760 INFO L82 PathProgramCache]: Analyzing trace with hash 925951131, now seen corresponding path program 1 times [2021-08-27 13:56:34,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:34,760 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23185967] [2021-08-27 13:56:34,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:34,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:34,774 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:34,789 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:34,861 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:56:34,862 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:56:34,862 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:56:34,862 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:56:34,862 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 13:56:34,862 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:34,862 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:56:34,862 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:56:34,862 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration2_Loop [2021-08-27 13:56:34,862 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:56:34,862 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:56:34,863 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:34,869 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:34,872 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:34,940 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:56:34,940 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 13:56:34,941 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:34,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:34,945 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:34,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-08-27 13:56:34,948 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:56:34,948 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:56:34,965 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:56:34,965 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:56:34,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:34,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:34,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:34,993 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:35,002 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:56:35,003 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:56:35,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-08-27 13:56:35,024 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:56:35,024 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:56:35,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:35,049 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:35,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:35,051 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:35,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-08-27 13:56:35,054 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:56:35,054 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:56:35,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:35,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:35,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:35,100 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:35,108 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 13:56:35,108 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:56:35,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-08-27 13:56:35,218 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 13:56:35,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:35,221 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:56:35,221 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:56:35,221 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:56:35,221 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:56:35,221 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 13:56:35,221 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:35,221 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:56:35,221 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:56:35,221 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration2_Loop [2021-08-27 13:56:35,221 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:56:35,221 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:56:35,223 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:35,234 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:35,238 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:35,307 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:56:35,308 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 13:56:35,308 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:35,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:35,309 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:35,315 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 13:56:35,322 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:56:35,323 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:56:35,323 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:56:35,323 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:56:35,325 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 13:56:35,326 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 13:56:35,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-08-27 13:56:35,344 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:56:35,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:35,370 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:35,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:35,371 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:35,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-08-27 13:56:35,374 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 13:56:35,380 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:56:35,381 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:56:35,381 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:56:35,381 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:56:35,383 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 13:56:35,383 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 13:56:35,400 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:56:35,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:35,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:35,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:35,418 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:35,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-08-27 13:56:35,421 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 13:56:35,427 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:56:35,427 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:56:35,427 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:56:35,427 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:56:35,427 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:56:35,430 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:56:35,430 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:56:35,438 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 13:56:35,446 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-08-27 13:56:35,446 INFO L444 ModelExtractionUtils]: 1 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-27 13:56:35,446 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:35,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:35,447 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:35,459 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 13:56:35,460 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 13:56:35,460 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 13:56:35,460 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~n~0, ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~n~0 - 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2021-08-27 13:56:35,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-08-27 13:56:35,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:35,482 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 13:56:35,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:35,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 13:56:35,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:56:35,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:35,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 13:56:35,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:56:35,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 13:56:35,542 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-08-27 13:56:35,542 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 17 transitions. cyclomatic complexity: 7 Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:35,561 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 17 transitions. cyclomatic complexity: 7. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 22 states and 31 transitions. Complement of second has 6 states. [2021-08-27 13:56:35,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-27 13:56:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:35,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2021-08-27 13:56:35,563 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 2 letters. Loop has 4 letters. [2021-08-27 13:56:35,563 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:35,563 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 6 letters. Loop has 4 letters. [2021-08-27 13:56:35,563 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:35,563 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 2 letters. Loop has 8 letters. [2021-08-27 13:56:35,564 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:35,564 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 22 states and 31 transitions. [2021-08-27 13:56:35,565 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-08-27 13:56:35,565 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 22 states to 15 states and 22 transitions. [2021-08-27 13:56:35,565 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2021-08-27 13:56:35,566 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2021-08-27 13:56:35,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 22 transitions. [2021-08-27 13:56:35,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 13:56:35,566 INFO L681 BuchiCegarLoop]: Abstraction has 15 states and 22 transitions. [2021-08-27 13:56:35,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states and 22 transitions. [2021-08-27 13:56:35,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-08-27 13:56:35,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:35,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 21 transitions. [2021-08-27 13:56:35,568 INFO L704 BuchiCegarLoop]: Abstraction has 14 states and 21 transitions. [2021-08-27 13:56:35,568 INFO L587 BuchiCegarLoop]: Abstraction has 14 states and 21 transitions. [2021-08-27 13:56:35,568 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-08-27 13:56:35,568 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 21 transitions. [2021-08-27 13:56:35,569 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-08-27 13:56:35,569 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:56:35,569 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:56:35,569 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-08-27 13:56:35,569 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1] [2021-08-27 13:56:35,570 INFO L791 eck$LassoCheckResult]: Stem: 162#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~i~0, main_~j~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~n~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~n~0 := main_#t~nondet2;havoc main_#t~nondet2; 157#L19-2 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 158#L21-2 assume !!(main_~j~0 <= main_~i~0);main_~j~0 := 1 + main_~j~0; 163#L21-2 [2021-08-27 13:56:35,570 INFO L793 eck$LassoCheckResult]: Loop: 163#L21-2 assume !!(main_~j~0 <= main_~i~0);main_~j~0 := 1 + main_~j~0; 163#L21-2 [2021-08-27 13:56:35,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:35,570 INFO L82 PathProgramCache]: Analyzing trace with hash 31081, now seen corresponding path program 1 times [2021-08-27 13:56:35,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:35,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629808221] [2021-08-27 13:56:35,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:35,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:35,576 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:35,579 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:35,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:35,580 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 1 times [2021-08-27 13:56:35,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:35,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800299130] [2021-08-27 13:56:35,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:35,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:35,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:35,583 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:35,585 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:35,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:35,586 INFO L82 PathProgramCache]: Analyzing trace with hash 963530, now seen corresponding path program 2 times [2021-08-27 13:56:35,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:35,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840972514] [2021-08-27 13:56:35,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:35,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:35,591 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:35,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:35,596 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:35,624 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:56:35,624 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:56:35,624 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:56:35,625 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:56:35,625 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 13:56:35,625 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:35,626 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:56:35,626 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:56:35,626 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration3_Loop [2021-08-27 13:56:35,626 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:56:35,626 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:56:35,628 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:35,631 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:35,637 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:35,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:35,691 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:56:35,691 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 13:56:35,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:35,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:35,701 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:35,703 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:56:35,704 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:56:35,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-08-27 13:56:35,729 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 13:56:35,729 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 13:56:35,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:35,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:35,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:35,754 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:35,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-08-27 13:56:35,763 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:56:35,763 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:56:35,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:35,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:35,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:35,809 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:35,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-08-27 13:56:35,817 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 13:56:35,817 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:56:35,937 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 13:56:35,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:35,942 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:56:35,942 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:56:35,942 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:56:35,942 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:56:35,942 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 13:56:35,942 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:35,942 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:56:35,942 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:56:35,942 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration3_Loop [2021-08-27 13:56:35,942 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:56:35,942 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:56:35,943 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:35,946 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:35,952 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:35,995 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:56:35,995 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 13:56:35,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:35,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:35,996 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:36,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-08-27 13:56:36,007 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 13:56:36,012 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:56:36,013 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:56:36,013 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:56:36,013 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:56:36,017 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-08-27 13:56:36,017 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-08-27 13:56:36,020 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 13:56:36,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:36,037 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:36,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:36,043 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:36,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-08-27 13:56:36,045 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 13:56:36,050 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:56:36,051 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:56:36,051 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:56:36,051 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:56:36,051 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:56:36,052 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:56:36,052 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:56:36,070 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 13:56:36,072 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-27 13:56:36,072 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-27 13:56:36,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:36,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:36,081 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:36,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-08-27 13:56:36,085 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 13:56:36,085 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 13:56:36,085 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 13:56:36,085 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0, ULTIMATE.start_main_~j~0) = 2*ULTIMATE.start_main_~i~0 - 2*ULTIMATE.start_main_~j~0 + 1 Supporting invariants [] [2021-08-27 13:56:36,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:36,110 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 13:56:36,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:36,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 13:56:36,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:56:36,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:36,168 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 13:56:36,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:56:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:56:36,169 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2021-08-27 13:56:36,169 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 21 transitions. cyclomatic complexity: 10 Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:36,188 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states and 21 transitions. cyclomatic complexity: 10. Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 26 states and 38 transitions. Complement of second has 5 states. [2021-08-27 13:56:36,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-27 13:56:36,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:36,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2021-08-27 13:56:36,189 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 3 letters. Loop has 1 letters. [2021-08-27 13:56:36,189 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:36,190 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 4 letters. Loop has 1 letters. [2021-08-27 13:56:36,190 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:36,190 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 3 letters. Loop has 2 letters. [2021-08-27 13:56:36,190 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:36,190 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 38 transitions. [2021-08-27 13:56:36,193 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-08-27 13:56:36,199 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 22 states and 33 transitions. [2021-08-27 13:56:36,199 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2021-08-27 13:56:36,199 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2021-08-27 13:56:36,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 33 transitions. [2021-08-27 13:56:36,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 13:56:36,200 INFO L681 BuchiCegarLoop]: Abstraction has 22 states and 33 transitions. [2021-08-27 13:56:36,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states and 33 transitions. [2021-08-27 13:56:36,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2021-08-27 13:56:36,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:36,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 27 transitions. [2021-08-27 13:56:36,203 INFO L704 BuchiCegarLoop]: Abstraction has 18 states and 27 transitions. [2021-08-27 13:56:36,203 INFO L587 BuchiCegarLoop]: Abstraction has 18 states and 27 transitions. [2021-08-27 13:56:36,203 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-08-27 13:56:36,203 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states and 27 transitions. [2021-08-27 13:56:36,205 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2021-08-27 13:56:36,205 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 13:56:36,206 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 13:56:36,208 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1] [2021-08-27 13:56:36,208 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1] [2021-08-27 13:56:36,209 INFO L791 eck$LassoCheckResult]: Stem: 235#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_~i~0, main_~j~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~n~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~j~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~n~0 := main_#t~nondet2;havoc main_#t~nondet2; 229#L19-2 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 230#L21-2 assume !!(main_~j~0 <= main_~i~0);main_~j~0 := 1 + main_~j~0; 236#L21-2 assume !(main_~j~0 <= main_~i~0); 245#L21-3 main_~i~0 := 1 + main_~i~0; 243#L19-2 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 0; 239#L21-2 assume !!(main_~j~0 <= main_~i~0);main_~j~0 := 1 + main_~j~0; 238#L21-2 [2021-08-27 13:56:36,209 INFO L793 eck$LassoCheckResult]: Loop: 238#L21-2 assume !!(main_~j~0 <= main_~i~0);main_~j~0 := 1 + main_~j~0; 238#L21-2 [2021-08-27 13:56:36,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:36,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1360285992, now seen corresponding path program 2 times [2021-08-27 13:56:36,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:36,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144120682] [2021-08-27 13:56:36,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:36,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:36,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:36,223 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:36,237 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:36,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:36,238 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 2 times [2021-08-27 13:56:36,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:36,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862008806] [2021-08-27 13:56:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:36,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:36,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:36,243 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:36,246 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:36,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:36,246 INFO L82 PathProgramCache]: Analyzing trace with hash 780807227, now seen corresponding path program 3 times [2021-08-27 13:56:36,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 13:56:36,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978744022] [2021-08-27 13:56:36,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 13:56:36,247 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 13:56:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:36,251 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 13:56:36,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 13:56:36,263 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 13:56:36,277 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:56:36,277 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:56:36,277 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:56:36,277 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:56:36,278 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 13:56:36,278 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:36,278 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:56:36,278 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:56:36,278 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration4_Loop [2021-08-27 13:56:36,278 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:56:36,278 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:56:36,279 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:36,285 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:36,288 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:36,315 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:56:36,317 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 13:56:36,317 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:36,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:36,320 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:36,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-08-27 13:56:36,322 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 13:56:36,322 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:56:36,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:36,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:36,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:36,369 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:36,377 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 13:56:36,377 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 13:56:36,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-08-27 13:56:36,491 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 13:56:36,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Ended with exit code 0 [2021-08-27 13:56:36,494 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 13:56:36,494 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 13:56:36,494 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 13:56:36,494 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 13:56:36,494 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 13:56:36,495 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:36,495 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 13:56:36,495 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 13:56:36,495 INFO L133 ssoRankerPreferences]: Filename of dumped script: BrockschmidtCookFuhs-CAV2013-Fig1.c_Iteration4_Loop [2021-08-27 13:56:36,495 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 13:56:36,495 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 13:56:36,495 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:36,502 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:36,506 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 13:56:36,545 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 13:56:36,545 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 13:56:36,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:36,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:36,546 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:36,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-08-27 13:56:36,548 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 13:56:36,553 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 13:56:36,553 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 13:56:36,553 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 13:56:36,553 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 13:56:36,553 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 13:56:36,554 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 13:56:36,554 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 13:56:36,556 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 13:56:36,558 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-27 13:56:36,558 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-27 13:56:36,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 13:56:36,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 13:56:36,559 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 13:56:36,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-08-27 13:56:36,565 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 13:56:36,565 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 13:56:36,565 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 13:56:36,565 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0, ULTIMATE.start_main_~j~0) = 2*ULTIMATE.start_main_~i~0 - 2*ULTIMATE.start_main_~j~0 + 1 Supporting invariants [] [2021-08-27 13:56:36,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2021-08-27 13:56:36,582 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 13:56:36,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:36,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:36,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 13:56:36,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:56:36,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:36,640 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 13:56:36,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:56:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:56:36,641 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2021-08-27 13:56:36,641 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states and 27 transitions. cyclomatic complexity: 13 Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:36,650 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 18 states and 27 transitions. cyclomatic complexity: 13. Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 24 states and 35 transitions. Complement of second has 5 states. [2021-08-27 13:56:36,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-27 13:56:36,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:36,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2021-08-27 13:56:36,651 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 7 letters. Loop has 1 letters. [2021-08-27 13:56:36,651 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:36,651 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 13:56:36,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:36,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 13:56:36,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:56:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:36,699 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 13:56:36,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:56:36,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:56:36,700 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 1 loop predicates [2021-08-27 13:56:36,700 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states and 27 transitions. cyclomatic complexity: 13 Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:36,708 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 18 states and 27 transitions. cyclomatic complexity: 13. Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 24 states and 35 transitions. Complement of second has 5 states. [2021-08-27 13:56:36,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-27 13:56:36,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:36,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2021-08-27 13:56:36,709 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 7 letters. Loop has 1 letters. [2021-08-27 13:56:36,710 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:36,710 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 13:56:36,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 13:56:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:36,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-27 13:56:36,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:56:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 13:56:36,752 WARN L261 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 13:56:36,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 13:56:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 13:56:36,753 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2021-08-27 13:56:36,754 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states and 27 transitions. cyclomatic complexity: 13 Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:36,764 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 18 states and 27 transitions. cyclomatic complexity: 13. Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 21 states and 30 transitions. Complement of second has 4 states. [2021-08-27 13:56:36,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-08-27 13:56:36,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 13:56:36,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2021-08-27 13:56:36,766 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 7 letters. Loop has 1 letters. [2021-08-27 13:56:36,766 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:36,766 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 8 letters. Loop has 1 letters. [2021-08-27 13:56:36,766 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:36,766 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 7 letters. Loop has 2 letters. [2021-08-27 13:56:36,766 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 13:56:36,767 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 30 transitions. [2021-08-27 13:56:36,767 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 13:56:36,767 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 0 states and 0 transitions. [2021-08-27 13:56:36,767 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-08-27 13:56:36,767 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-08-27 13:56:36,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-08-27 13:56:36,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 13:56:36,767 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 13:56:36,767 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 13:56:36,767 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 13:56:36,767 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-08-27 13:56:36,767 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-08-27 13:56:36,767 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 13:56:36,767 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-08-27 13:56:36,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.08 01:56:36 BoogieIcfgContainer [2021-08-27 13:56:36,772 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-08-27 13:56:36,772 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 13:56:36,772 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 13:56:36,773 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 13:56:36,773 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:56:33" (3/4) ... [2021-08-27 13:56:36,775 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 13:56:36,775 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 13:56:36,776 INFO L168 Benchmark]: Toolchain (without parser) took 3880.17 ms. Allocated memory was 58.7 MB in the beginning and 88.1 MB in the end (delta: 29.4 MB). Free memory was 38.0 MB in the beginning and 38.0 MB in the end (delta: 48.5 kB). Peak memory consumption was 27.6 MB. Max. memory is 16.1 GB. [2021-08-27 13:56:36,776 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 58.7 MB. Free memory was 41.0 MB in the beginning and 41.0 MB in the end (delta: 51.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 13:56:36,777 INFO L168 Benchmark]: CACSL2BoogieTranslator took 184.73 ms. Allocated memory is still 58.7 MB. Free memory was 37.9 MB in the beginning and 29.4 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-27 13:56:36,777 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.76 ms. Allocated memory is still 58.7 MB. Free memory was 29.4 MB in the beginning and 28.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 13:56:36,777 INFO L168 Benchmark]: Boogie Preprocessor took 55.71 ms. Allocated memory is still 58.7 MB. Free memory was 28.1 MB in the beginning and 43.7 MB in the end (delta: -15.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-08-27 13:56:36,778 INFO L168 Benchmark]: RCFGBuilder took 223.12 ms. Allocated memory is still 58.7 MB. Free memory was 43.5 MB in the beginning and 34.8 MB in the end (delta: 8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-27 13:56:36,778 INFO L168 Benchmark]: BuchiAutomizer took 3379.47 ms. Allocated memory was 58.7 MB in the beginning and 88.1 MB in the end (delta: 29.4 MB). Free memory was 34.6 MB in the beginning and 38.0 MB in the end (delta: -3.4 MB). Peak memory consumption was 24.8 MB. Max. memory is 16.1 GB. [2021-08-27 13:56:36,778 INFO L168 Benchmark]: Witness Printer took 2.66 ms. Allocated memory is still 88.1 MB. Free memory is still 38.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 13:56:36,780 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 58.7 MB. Free memory was 41.0 MB in the beginning and 41.0 MB in the end (delta: 51.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 184.73 ms. Allocated memory is still 58.7 MB. Free memory was 37.9 MB in the beginning and 29.4 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 28.76 ms. Allocated memory is still 58.7 MB. Free memory was 29.4 MB in the beginning and 28.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 55.71 ms. Allocated memory is still 58.7 MB. Free memory was 28.1 MB in the beginning and 43.7 MB in the end (delta: -15.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * RCFGBuilder took 223.12 ms. Allocated memory is still 58.7 MB. Free memory was 43.5 MB in the beginning and 34.8 MB in the end (delta: 8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 3379.47 ms. Allocated memory was 58.7 MB in the beginning and 88.1 MB in the end (delta: 29.4 MB). Free memory was 34.6 MB in the beginning and 38.0 MB in the end (delta: -3.4 MB). Peak memory consumption was 24.8 MB. Max. memory is 16.1 GB. * Witness Printer took 2.66 ms. Allocated memory is still 88.1 MB. Free memory is still 38.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 4 terminating modules (0 trivial, 3 deterministic, 1 nondeterministic). One deterministic module has affine ranking function -1 * i and consists of 6 locations. One deterministic module has affine ranking function n + -1 * i and consists of 4 locations. One deterministic module has affine ranking function 2 * i + -2 * j + 1 and consists of 3 locations. One nondeterministic module has affine ranking function 2 * i + -2 * j + 1 and consists of 3 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.3s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 2.6s. Construction of modules took 0.0s. Büchi inclusion checks took 0.4s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 3. Automata minimization 14.6ms AutomataMinimizationTime, 3 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 18 states and ocurred in iteration 3. Nontrivial modules had stage [3, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 1/1 HoareTripleCheckerStatistics: 26 SDtfs, 31 SDslu, 9 SDs, 0 SdLazy, 50 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 50.0ms Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT4 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital14 mio100 ax193 hnf100 lsp52 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq157 hnf93 smp100 dnf100 smp100 tf110 neg100 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 52ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.8s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-08-27 13:56:36,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Ended with exit code 0 [2021-08-27 13:56:37,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request...